454 BULLETIN OK THE UNITED STATES FISH COMMISSION. 



The main part of the gulf has a flat bottom, ranging in depth from 

 about 90 to 180 fathoms. In its shoaler parts, at a depth of about 100 

 fathoms, there are indications of flat ridges, which attach themselves 

 to rocks and ledges, and stretch in the direction of prevailing currents. 



At a depth of 40 fathoms George's Bank is united with Nantucket 

 Shoals, and this vast bank, which lies across the entrance to the gulf, 

 is almost continuous to Sable Island Dank. The separating channel is 

 only about 140 fathoms deep and 20 miles wide; at a depth of 500 

 fathoms every trace of it disappears. 



The existence of elevated sea beaches, around the Gulf of Maine, 

 goes to prove that, at a time subsequent to the glacial period, when the 

 river valleys in New England were tilled with water to their very tops, 

 at the time of the "Champlain Period," the shores of the gulf had sub- 

 sided, at Sankaty Head, 85 feet; at the coast of Maine, in some parts, 

 217 feet; about the Bay of Fundy, 350 to 400 feet (Dana's Manual of 

 Geology). In consequence of this subsidence, the waters of the Saint 

 Lawrence must have had free access to the Gulf of Maine, since the 

 separating isthmus is only about 20 feet above high water. Great 

 quantities of floating ice must have passed through the Bay of Fundy, 

 and the steepness of the banks of the channels, on both sides of Grand 

 Man an Island, bears evidence of powerful abrasion from the direction 

 of the Bay of Fundy. 



The effect of a boreal current upon the fauna and upon the climate of 

 the Gulf of Maine is a very tempting subject for inquiry, but it is be- 

 yond the scope of the present article. 



In Passamaquoddy Bay, about Eastport, we find very marked fiord 

 indications running southeast, and again, others nearly as well devel- 

 pped, bearing west of south. According to the views heretofore ex- 

 pressed, the first are contemporary in formation with similar marks 

 found along the whole coast, and belong to the earlier part of the glacial 

 period, whilst the southwest marks belong to a later part and are of a 

 more local character. 



Washington, D. 0., December 2G, 1882. 



lOS.— REPORT IJPOS HATCHING ONE BULLION WHITEFISH EGCS 

 FROM THE GREAT LAKES AT ORLAND, DIB., AND UPON PLANT- 

 ING THE YOUNG IN EAGLE LAKE, MOUNT DESERT. 



By II. II. BUCK. 



The eggs came on Monday, February 20, in one case, which was large 

 and heavy and not provided with handles, so that it was rather weak 

 when it arrived. The eggs were immediately taken out and found to 

 be cool. The temperature of the moss was below 35°, but a small per- 



